INTERVAL ‘-08:00’ HOUR TO MINUTE【The time zone 8 hours west from UTC (equivalent to PST).】、LOCAL DEFAULT【Set the time zone to your local
b | character varying(12) | not null default 'try me'::character varying test=# drop table tbl_default ; DROP TABLE test=# create table tbl_default(a int not null,b varchar(12) not null); CREATE TABLE test=# alter table tbl_default alter COLUMN b set default 'try me'; ALTER TABL...
alter table [表名] alter column [字段名] set default [新的默认值]; *去除缺省值: alter table [表名] alter column [字段名] drop default; *修改表中的某行某列的数据: update [表名] set [目标字段名]=[目标值] where [该行特征]; *删除表中某行数据: delete from [表名] where [该行特...
SET_CONFIG System information functions CURRENT_AWS_ACCOUNT CURRENT_DATABASE CURRENT_NAMESPACE CURRENT_SCHEMA CURRENT_SCHEMAS CURRENT_SESSION_ARN CURRENT_USER CURRENT_USER_ID DEFAULT_IAM_ROLE GET_MOUNTED_ROLE HAS_ASSUMEROLE_PRIVILEGE HAS_DATABASE_PRIVILEGE HAS_SCHEMA_PRIVILEGE HAS_TABLE_PRIVILEGE LAST_USE...
CREATE[UNIQUE]INDEX[CONCURRENTLY][[IFNOTEXISTS]name]ON[ONLY]table_name[USINGmethod]({column_name|(expression)}[COLLATEcollation][opclass[(opclass_parameter=value[,...])]][ASC|DESC][NULLS{FIRST|LAST}][,...])[INCLUDE(column_name[,...])][WITH(storage_parameter[=value][,...])][TABLESP...
相应的 SQL 函数为 set_config(setting_name, new_value, is_local)。 使用SHOW 命令检查现有参数设置。 其 SQL 函数等效项为 current_setting(setting_name text)。 支持的服务器参数 Autovacuum 展开表 名称版本说明 autovacuum 11, 12, 13, 14, 15, 16, 17 控制服务器是否应运行 autovacuum 子进程。
ALTER DATABASE name SET configparameter { TO | = } { value | DEFAULT } ALTER DATABASE name RESET configuration ***设置和重置 Session 级别的配置。 ***通过 SET 命令设置当前 Session 的配置 (3)使配置生效:SELECT pg_reload_conf();或pg_ctl -D datareload ...
, "ParamValueType": "integer", "SpecRelated": false, "SpecRelationSet": null, "StandbyRelated": 0, "Unit": "", "VersionRelationSet": null } ] } } 5. 开发者资源 腾讯云 API 平台 腾讯云 API 平台 是综合 API 文档、错误码、API Explorer 及 SDK 等资源的统一查询平台,方便您从同一入口...
BEGIN;CREATETABLEitems (keytext,valuetext);-- parallel data loading:SELECTcreate_distributed_table(‘items’, ‘key’);SETclient_encodingTO'UTF8'; \COPYitemsFROM‘items.csv’CREATETYPEcoordinatesAS(xint, yint); ERROR: cannot runtypecommand because there was a parallel operationona distributedtablein...
The default value for this parameter is '$libdir'. If the value is set to an empty string '', the automatic path search is turned off. 例如 dynamic_library_path = '/usr/local/lib/postgresql:/home/my_project/lib:$libdir' 代码 /* * process any libraries that should be preloaded ...